Presser foot



Jan. 18, 1927.

H. R. RUSH PRESSER FOOT Filed June 21, 1922 ...mi A

Patented Jan. 18, 1927.

UNITED STATES rasen PATENT. OFFICE.

HENRY R. RUSH. OF ENDICOTT", NEW'YORK,

PRESSER FOOT.

Application filed .Tune 21,

This invention relates to presser feet of sewing machines, and isparticularly designed for use in machines for sewing leather or otherthick heavy material.

The object of the invention is to provide a presser foot so connected tothe presser bar that it will be normally held` to its work withsufficient pressurel but is capable of rocking or pivotingi o n thepresser bar o in such manner that it can ride over a seam or otherunusual thickness of material or obstruction therein Without stoppingthe advance of the materialbeing operated upon. Such presser foot canride over irregularities or thicknesses in the material being operatedupon which anordinary presserffoot would not do, and whichirregularities or thicknesses frequently cause stopping of the feedingmovement of the material with the result that the needle operatesrepeatedly in the same hole, resulting in. disfiguring the stitching andmaterial, and sometimes entirely spoilingthe work being operated upon.

l will explain the invention with reference to the accompanying drawingswhich illustrate a practical embodiment of the invention, and summarizein the claims the novel features of construction, and novel combinationsof parts for which protection is desired.

ln said drawings: l Fig. l is an enlarged front View of my novel presserfoot attachment connected to the presser bar of a standard sewing ma-:15 chine.

Fig. 2 is a side view of Fig. l.

Fig. 3 is an enlarged side view of the presser foot attachment detached.

Fig. l is a vertical section on the line l--l Fig. 2.

Fig. 5 is a transverse section on the line 5 Fig. 3.

The presser foot l may be of any desired form, and as shown is of thetype commonly used in leather sewing machines. It has a shank lu whichis ordinarily fastened to the bottom of the presser bar. In the presentinvention this shank is mounted in aholder 2 which is preferablyU-shaped in cross section and is adjustably supported in a horizontalgroove 3g in the side of a metal block or head 3 having a shank 3aadapted toenter the usual socket in the lower end of the presser bar 8;and said shank may be secured to the presser bar by means of 1922.Serial No. 569,900.

screws 8a, 8b set about 45 removed from each other, as indicated inFigs. l' and 2.

The holder 2 is adjustable longitudinally ofthe slot 3g, forwardor-backward, in relationtothe presser bar, andmay be confined in.adjusted position by any suitablev means. As shown the holder isfastened in the slot by screws l and 4f? whose Shanks are tapped intothe head 3; above and below the holder 2, so that their heads engagevthe outer Wall of the holder.

The shank l1 is pivotally connected to the holder so that it cantilt orrock therein,.but cannot move longitudinally thereof when in positiontherein. Preferably the shank 7 is pivoted in the holder by means offanotch lb in the under side and near the rear end of shank la, engaging arib 2b on the bottom and preferably rear end of the holder 2, as shownin Figs. 3, Lland 5. The rib 2b can be readily formed by upsetting therear end of the bottom of the holder, as shown in thev drawings.

A vertically disposed sleeve 5 is. mounted upon the head 3, abo-ve theholder 2, and in front thereof. In this sleeve 5V is confined anexpansion spring 6 which bears upon the upper side of the shank of thepresser foot in frontv of the pivot point ll thereof. The presser ofspring 6 is regulable by a screw 5c tapped into the threaded upper endof the sleeve as shown.

When properly attached to a machine the holder 2 can be adjusted backand forth relative to the presser bar 8 until the eye of thepresser footis in line with the needle. When properly adjusted the presser foot islocked in that position by tightening the screws 4l and li-n. The upperscrew l can be adjusted so as to press or flex the outer side of theholder 2 and press it close to the shank of the presser foot, therebytaking up any slight play therebetween which might be due to wear orinaccurate fitting in the first place between the width of the presserfoot shank and the width of the groove in the holder 2. A roller guide 7may be used beside the presser foot; and is shown as of the usualconstruction and can be moved away from the presser foot when it isdesired to thread or adjust the needle. This presser foot is capable ofrocking or tilting to adapt itself to uneven places in the leather ormaterial (such as two` thicknesses of leather one upon the other, orthicker places in the leather, such as back stays, tongues, seams, etc.)without having to lift the entire presser bar.

This presser foot has been found entirely practical, and saves much lossin operation as compared With an ordinary presser' foot, in thatfrequently an ordinary presser foot will not mount the edge of anadditional thickness of leather, or material, or a thicker portion ofthe material, but will hit against such edge and stop the feedingmovement of the material, and the needle operating up and down in thesame or nearly the saine place, cuts and disiigures the leather andstitching. In my construction the upturned point of the presser footwill ride or rise over any obstruction much more readily and with lessresistance than where the entire presser bar must be raised, and afterthe point of the foot has mounted the obstruction, then, as the work isadvanced farther under the foot, there is a gradually increasing liftingpressure exerted upon the presser bar and it is raised without shock andWithout stopping the advance of the work.

Vhat I claim is:

l. In combination a supporting member having a slot; a holder adjustablelongitudinally of the slot; a presser foot having a shank pivotallyconnected to the said holder within the slot; and means for yieldinglydepressing the presser foot.

2. In combination, a supporting member having a slot; a holderadjustable longitudinally of the slot and having a rib; a presser foothaving a shank provided with a notch for engagement with the rib of theholder to pivot the foot on the holder; and means for yieldinglydepressing the foot.

3. In combination, a supporting member having a slot, a holderadjustably longitudinally of the slot, a presser foot having a shankentered in said holder within the slot and pivot-ally retained therein,means for fastening the holder in the slot, and spring means fornormally depressing the forward end of the presser foot.

4s. In devices as set forth in claim 3, the presser' foot having a notchengaging a rib in the holder to pivot the foot therein, substantially asdescribed.

5. In combination al presser-bar, a head on the bar having a slot, aholder adjustable longitudinally of the slot, a presser foot having ashank pivotally mounted in said holder within the slot, means forfastening the holder in the slot, and spring means for normally holdingthe forward end of the presser foot depressed.

`6. In devices as set forth in claim 5, the presser foot having a notchengaging a rib in the holder to pivot the foot therein, substantially asdescribed. v

7. In combination a head having a hori- Zontal slot, a holder in saidslot, means to retain said holder in adjusted position in the slot, apresser foot having a shank pivotally connected with said holder, asleeve connected with the holder, and a spring in said sleeve engagingthe presser foot to hold the same depressed.

8. In devices as set forth in claim 7, the presser foot having a notchengaging a rib in the holder to pivot the foot therein, substantially asdescribed.

9. In combination, presser bar, a head on the presser bar having a slot,a holder in said slot, a screw engaging said holder to bind saine inadjusted position in the slot, a presser foot having a shank enteringsaid holder and detachably pivoted thereto, a sleeve connected with thehead and a spring in said sleeve engaging the presser foot to hold thesame depressed.

l0. In devices as set forth in claim 9, the presser foot having a notchengagine` a rib in the holder to pivot the foot therein, substantiallyas described.

1l. In combination a head having a slot, a U-shaped holder in said slot,a presser foot having a shank adjustably entered in said holder, screwsengaging said holder to bind saine in adjusted position in the slot andto compensate for wear of the shank, and a spring engaging the presserfoot to hold the same normally depressed.

l2. In devices as set forth in claim Il, the presser foot having a notchengaging a rib in the holder to pivot the foot` therein substantially asdescribed.

lf3. In combination with a presser bar, a head on the lower end of saidbar having a slot, a U-shaped holder fitted in said slot, a screw tappedinto the head and engaging said holder to retain the same in adjustedpositions in the groeve; a sleeve attached to the forward end of he headabove the slot, a presser foot having a shank pivoted in the holder, anda spring` in said sleeve engaging the upper side of the shank tonormally hold the presser foot depressed.

lt. ln con'ibination with a. presser bar, a head on the lower end ofsaid bar having a slot, a U-shaped holder fitted in said slot, screwstapped into the head and engaging said holder, a sleeve attached to theforward end of the head above the slot, a presser foot having a shankentering the holder and provided with a notch engaging a rib in theholder to pivot the shank therein, a spring in said sleeve engaging theupper side of the shank to nornally hold the presser foot depressed, anda screw for adjusting the pressure of said spring.

In testimony that I claim the foregoing as my own, l affix my signature.

HENRY R. RUSH.

